P0071 Terasic Technologies Inc, P0071 Datasheet - Page 34

• Manufacturer Part Number: P0071
• Description: TPAD MULTIMEDIADEVELOPMENT KIT
• Manufacturer: Terasic Technologies Inc
• Series: tPAD, Cyclone®IVr

Specifications of P0071

• Main Purpose: Reference Design, Tablet
• Embedded: Yes, FPGA / CPLD
• Utilized Ic / Part: EP4CE115
• Primary Attributes: 8-Inch TFT LCD, LED Backlight
• Secondary Attributes: 5-Megapixel Digital Image Sensor
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 4-6 Connections between the push-button and Cyclone IV E FPGA
Pushbutton depressed
Pushbutton released
Before
Debouncing
Schmitt Trigger
Debounced
Figure 4-7 Switch debouncing
There are also 18 slide switches on the DE2-115 board (See
Figure
4-8). These switches are not
debounced, and are assumed for use as level-sensitive data inputs to a circuit. Each switch is
connected directly to a pin on the Cyclone IV E FPGA. When the switch is in the DOWN position
(closest to the edge of the board), it provides a low logic level to the FPGA, and when the switch is
in the UP position it provides a high logic level.
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